View from highway - Photo - Newton highway sign Welcome to the city of Newton, New Jersey. The town lies upon the slope of a gentle hill, of mingled slate and limestone, at whose foot a spring sends forth the first waters of the Paulinskill. The site of Newton’s town square lies within a tract of 2,500 acres, situated at the head of a branch of Tohokenetcunck River, New Jersey. New York/New Jersey State Line to Junction of Interstate Highway #80